Conn and others said they joined together to raise awareness of the need for genetically modified food labeling and the dangers of cancer-causing pesticides.

The demonstration was held two days before the "March Against Monsanto" -- a campaign aimed at creating peaceful protest around the world to raise awareness.

Conn said he was hopeful Thursday's demonstration would impact Monsanto's operations.

"Certainly we hope it costs them some money today, and that's all we have is our pocketbooks," Conn said.

Monsanto released a written statement supporting an open dialogue about these topics:

"The 22,000 people of Monsanto are committed to having an open dialogue about food and agriculture – we’re proud of the work we do, and we’re eager for people to know more about us. We’re also proud of our collaboration with farmers and partnering organizations that help make a more balanced meal accessible for everyone. Our goal is to help farmers do this in a more sustainable way using fewer resources and having a smaller impact on the environment. We know people have different points of view on these topics, and it’s important that they’re able to express and share them."